git.sesse.net Git - vlc/blob - include/vdec_ext-plugins.h

   1 /*****************************************************************************
   2  * vdec_common.h : structures from the video decoder exported to plug-ins
   3  *****************************************************************************
   4  * Copyright (C) 1999, 2000 VideoLAN
   5  * $Id: vdec_ext-plugins.h,v 1.2 2001/07/18 14:21:00 massiot Exp $
   6  *
   7  * Authors: Christophe Massiot <massiot@via.ecp.fr>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Function pointers
  26  *****************************************************************************/
  27 typedef void (*f_motion_t)( struct macroblock_s * );
  28
  29 /*****************************************************************************
  30  * macroblock_t : information on a macroblock passed to the video_decoder
  31  *                thread
  32  *****************************************************************************/
  33 typedef struct macroblock_s
  34 {
  35     picture_t *             p_picture;          /* current frame in progress */
  36
  37     int                     i_mb_type;                    /* macroblock type */
  38     int                     i_coded_block_pattern;
  39                                                  /* which blocks are coded ? */
  40     int                     i_chroma_nb_blocks;         /* number of blocks for
  41                                                          * chroma components */
  42
  43     /* IDCT information */
  44     dctelem_t               ppi_blocks[12][64];                    /* blocks */
  45     void ( * pf_idct[12] )  ( void *, dctelem_t*, int );
  46                                                      /* sparse IDCT or not ? */
  47     int                     pi_sparse_pos[12];             /* position of the
  48                                                             * non-NULL coeff */
  49
  50     /* Motion compensation information */
  51     f_motion_t              pf_motion;    /* function to use for motion comp */
  52     picture_t *             p_backward;          /* backward reference frame */
  53     picture_t *             p_forward;            /* forward reference frame */
  54     int                     ppi_field_select[2][2];      /* field to use to
  55                                                           * form predictions */
  56     int                     pppi_motion_vectors[2][2][2];  /* motion vectors */
  57     int                     ppi_dmv[2][2];    /* differential motion vectors */
  58                             /* coordinates of the block in the picture */
  59     int                     i_l_x, i_c_x;
  60     int                     i_motion_l_y;
  61     int                     i_motion_c_y;
  62     int                     i_l_stride;         /* number of yuv_data_t to
  63                                                  * ignore when changing line */
  64     int                     i_c_stride;                  /* idem, for chroma */
  65     boolean_t               b_P_second;  /* Second field of a P picture ?
  66                                           * (used to determine the predicting
  67                                           * frame)                           */
  68     boolean_t               b_motion_field;  /* Field we are predicting
  69                                               * (top field or bottom field) */
  70
  71     /* AddBlock information */
  72     yuv_data_t *            p_data[12];              /* pointer to the position
  73                                                       * in the final picture */
  74     int                     i_addb_l_stride, i_addb_c_stride;
  75                                  /* nb of coeffs to jump when changing lines */
  76 } macroblock_t;
  77
  78 /* Macroblock types */
  79 #define MB_INTRA                        1
  80 #define MB_PATTERN                      2
  81 #define MB_MOTION_BACKWARD              4
  82 #define MB_MOTION_FORWARD               8
  83 #define MB_QUANT                        16
  84
  85 /* Motion types */
  86 #define MOTION_FIELD                    1
  87 #define MOTION_FRAME                    2
  88 #define MOTION_16X8                     2
  89 #define MOTION_DMV                      3
  90
  91 /* Structures */
  92 #define TOP_FIELD               1
  93 #define BOTTOM_FIELD            2
  94 #define FRAME_STRUCTURE         3
  95
  96 /*****************************************************************************
  97  * vdec_thread_t: video decoder thread descriptor
  98  *****************************************************************************/
  99 typedef struct vdec_thread_s
 100 {
 101     vlc_thread_t        thread_id;                /* id for thread functions */
 102     boolean_t           b_die;
 103
 104     /* IDCT iformations */
 105     void *              p_idct_data;
 106
 107     /* Input properties */
 108     struct vdec_pool_s * p_pool;
 109 } vdec_thread_t;
 110